ORDER 44. ROSACEJ3. 107 



12. WALDSTEINIA, Willd. DRY STRAWBERRY. Cal. 5-cleft, with 

 5 alternate, sometimes minute and deciduous bractlets. Pet. 5 or more, 

 sessile, deciduous. Sta. GO. Sty. 26. Ach. few, dry, on a dry receptacle, 

 if Acaulescent, with lobed or divided leaves, and yellow flowers. 



1 W. fragarioides Traut. Lvs. trifoliate ; Ifts. broad-cuneiform, incisely dentate- 



crenate, ciliate ; scapes bracteate, many-flowered. Hilly woods. 8'. June. 



2 W. lobiita T. & G. Lvs. simple, roundish, cordate, 3-5-lobed, incisely crenate ; 



scapes filiform, bracted, 3-7-flowered. Hills, South. &. May, June. 



13, POTENTILLA, L. CINQUEFOFL. Calyx concave, deeply 5-cleft, 

 with 5 bractlets added. Pet. 5, roundish. Sta. GO, slender. Ovaries col- 

 lected into a head on a small, dry, hairy torus. Sty. terminal and lateral, 

 deciduous. Achenia GO. y b Leaves compound. Flowers solitary 

 or cymous, mostly yellow. Figs. 365-6. 



SIBBALDIA. Stamens 5. Achenia 5 10, styles lateral. Low herbs. Mts No. 1 



C6MARUM. Sta. GO. Flowers brown-purple. Torus in fruit ovoid, spongy No. 2 



POTENTILLA proper. Sta. GO. Flowers yellow to white. Torus not enlarged. . (a) 



a Leaves palmately 3-foliate Nos. 3, 4, 5 



a Leaves palmately 5-foliate. Flowers yellow Nos. 6, 7 



a Leaves pinnate. b Shrubs, with the flowers axillary above No. 8 



b Herbs, with the flowers axillary, solitary Nos. 9, 10 



b Herbs, with the flowers in terminal cymes Nos. 11, 13 



Exotic species, with fls. roseate and purple. .Nos. 13, 14 



1 P. procumbent* Clairv. Lfts. 3, obovate, 3-toothed at apex, hairy beneath ; fls. 



corymbed. White Mts. ? (Pursh), and N. (Sibbaldia L.) 



2 P. palustris Scop. Lvs. pinnate; Ifts. 3 7, lance-oblong, obtuse, sharply serrate, 



hoary beneath ; sep. much longer than the purple petals ; torus persistent, large, 

 tasteless. 11 Swamps, N. 1 2f. June. (Comarum L.) 



3 P. Norvegica L. Hirsute ; st. erect, dichotomous above ; Ifts. 3, elliptical or obo- 



vate, dentate-serrate, petiolulate; cymes leafy; cal. exceeding the emarginate pale- 

 yellow petals ; sty. terminal. Old fields, thickets, Can. to Car. 1 4f. July Sept. 



4 P. tridentata Ait. Smooth ; st. ascending, woody and creeping at base ; Ifts. 3, 



obovate-cuneate, evergreen, entire, with 3 large teeth at the apex; cymes nearly 

 naked ; petals white, obovate. u Huh Mts. N. Eng. 612'. June. 



5 P. minima Haller? St. pubescent, ascending, mostly 1-flowered ; Ifts. 3, obovate, 



obtuse, incisely serrate with 59 teeth above ; petals yellow, longer than the sepals. 

 U White Mountains. 1 3', tufted. June, July. 



6 P. Caiiadensis L. ViHous-pubescent, procumbent, producing runners: Ifts. 5, 



oborate, cut-toothed above ; pedicels axillary, solitary, 1-ttowered. 

 a. pumlla. Small and delicate, flowering in Apr. May, everywhere. 

 /3. simplex. Subsimple, ascending, 814', smoothish ; fls. June Aug. Common. 



7 p. argentea L. St. ascending, tomentous ; Ifts. 5, oblong-cuneiform, with a few, 



large, incised teeth, smooth above, silvery canesceut beneath, sessile ; flowers in a 

 cymous corymb, small (3"). 11 Rocky hills, N. 6 KX. June Sept. 

 g p. Lfuticosa L. St. fruticous, very branching, hirsute, erect; Ifts. 5 7, linear- 

 oblong, all sessile, margin entire and rcvolute ; petals large, much longer than the 

 calyx. A low, bushy shrub, N. States. 1 2f. Flowers I'. June Aug. 



9 P. aiiserina L. Silver-weed. Goose-grass. St. slender, prostrate, rooting; Ivs. 



interruptedly pinnate ; Ifts. many pairs, oblong, deeply serrate, canescent beneath ; 

 peduncle solitary, 1-flowered, very long, u Wet, N. Eng. N. and W. 1 2f. Jn. Sept. 



10 P. paradoxa N. Decumbent at base, pubescent; Ivs. pinnate; Ifts. 7 9, ovate- 

 obi, incised, upper ones confluent ; ped. solitary, recurved in fruit ; ach. 2-lobed. (J) 

 Shores of Sodus Bay (Hankenson), W. to Oreg. If, June July. 



